Jack Christensen
78590be058
Definitely, need to add higher level methods for other packages to use. May rehide some of these interfaces at that point.
71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
package pgx
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import (
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"errors"
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"strconv"
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)
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func (c *Connection) SelectString(sql string) (s string, err error) {
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onDataRow := func(r *MessageReader, _ []FieldDescription) error {
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var null bool
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s, null = c.rxDataRowFirstValue(r)
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if null {
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return errors.New("Unexpected NULL")
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}
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return nil
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}
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err = c.SelectFunc(sql, onDataRow)
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return
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}
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func (c *Connection) selectInt(sql string, size int) (i int64, err error) {
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var s string
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s, err = c.SelectString(sql)
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if err != nil {
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return
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}
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i, err = strconv.ParseInt(s, 10, size)
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return
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}
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func (c *Connection) SelectInt64(sql string) (i int64, err error) {
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return c.selectInt(sql, 64)
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}
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func (c *Connection) SelectInt32(sql string) (i int32, err error) {
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var i64 int64
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i64, err = c.selectInt(sql, 32)
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i = int32(i64)
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return
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}
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func (c *Connection) SelectInt16(sql string) (i int16, err error) {
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var i64 int64
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i64, err = c.selectInt(sql, 16)
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i = int16(i64)
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return
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}
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func (c *Connection) selectFloat(sql string, size int) (f float64, err error) {
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var s string
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s, err = c.SelectString(sql)
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if err != nil {
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return
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}
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f, err = strconv.ParseFloat(s, size)
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return
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}
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func (c *Connection) SelectFloat64(sql string) (f float64, err error) {
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return c.selectFloat(sql, 64)
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}
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func (c *Connection) SelectFloat32(sql string) (f float32, err error) {
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var f64 float64
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f64, err = c.selectFloat(sql, 32)
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f = float32(f64)
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return
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}
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